A source tells Britain's The Sun, "He is thrilled to bits about being picked and everyone was congratulating him. He's been told informally by the prince. Guy's been a very discreet and good friend to William over the years. Those are qualities he wants to pass to George."

The other five close associates rumored to be lined up as godparents are Prince Harry, Prince William's sister-in-law, Pippa Middleton, and the royal couple's pals James Meade, Alicia Fox-Pitt and Thomas van Straubenzee.